虾的pdf生成时间很慢

问题描述

我正在使用prawn生成500页的PDF。大约需要65-70秒钟。我在每一页上都有一张图片。我通过删除图像进行了测试，但是性能时间并没有明显减少。使用wkhtmltopdf的500页PDF大约需要4-5s。 This link显示大虾比wkhtmltopdf快。但是在我的情况下，prawn慢。关于如何减少使用prawn的生成时间的任何建议？

class PdfGenerateTest < Prawn::Document
    def initialize
        super :page_size => 'A4',:page_layout => :landscape,:top_margin => 40,:bottom_margin => 30,:left_margin => 20,:right_margin => 10,:compress => true
        # font 'app/assets/fonts/ipaexm.ttf'

        font_families.update(
            'IPAex Mincho' => {
            normal: 'app/assets/fonts/ipaexm.ttf'
        })

        pages = 500
        pages.times do |i|
            stroke_axis
            header(i,pages)
            move_down 50
            images
            if i==0
              tables1
              tables2
              contents
              footer
            else
              tables2
              contents
              if i+1 != pages
                footer
              end
            end
            puts("----#{i}------#{Time.Now}")
        end

    end


    def header(page,pages)
        # pdf.font 'app/assets/fonts/ipaexm.ttf' # fontをパスで指定
        # 日本語フォントを使用しないと日本語使えません
        # pdf.font_families.update('Test' => { normal: 'app/assets/fonts/ipaexm.ttf',bold: 'app/assets/fonts/ipaexg.ttf' })
        # pdf.font 'Test'
        font 'IPAex Mincho'
        draw_text '請　求　書',:at => [350,520],:width => 100,:height => 100,size: 30
        line([350,510],[500,510])      #下辺
        stroke                      #描画
        draw_text '(1期) 2019/11/01〜2019/11/10',490],size: 10
        draw_text '(2期) 2019/11/11〜2019/11/20',475],size: 10
        draw_text '(3期) 2019/11/21〜2019/11/30',460],size: 10


        # 請求先　会社情報
        draw_text '株式会社　サナス　様',:at => [0,500],size: 17
        draw_text '〒 123-4567',:at => [5,size: 14
        draw_text '鹿児島県　鹿児島市.xxxxxxxxx',size: 14
        draw_text 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx',445],size: 14
        draw_text 'TEL [phone]   FAX [phone]',430],size: 14

        # 発行元会社情報
        draw_text 'Post Code  890-1234',:at => [550,size: 13
        draw_text 'Kagoshima city / Kagoshima pref.xxxxxxxxx',size: 13
        draw_text 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx',size: 13
        draw_text 'TEL [phone]   FAX [phone]',size: 13
        draw_text 'ABC Company Co.,ltd.',405],size: 16

        # ページ、請求番号、発行日
        draw_text "ページ #{page + 1} / #{pages}",540],size: 12
        draw_text "請求書番号: 12345-678901234-56789",515],size: 12
        draw_text "発効日: #{Time.Now}",size: 12

    end

    def images
        image = "#{Rails.root}/app/assets/images/seal.jpg"
        transparent(0.5) do
        image image,:at => [700,480],:width => 100
        end
    end

    def tables1
        font 'IPAex Mincho'
        move_down 100
        t = make_table([ ["incoming fee","outgoing fee","keeping","others","total","tax"],["1","2","3","4","5","6"]])
        t.draw
        move_up 90
    end

    def tables2
        font 'IPAex Mincho'
        move_down 140
        1.times do |i|
          table([ ["品番","品名","諸掛","K","前期残数","数量","重量","単位","単価","小計","金額"],"6","7","8","9","10","11"],],:column_widths => [70,200,50,25,60,40,70],:row_colors => ["F0F0F0","F0FFC0","FFFFCC","FFFFCC"])

          end
    end

    def contents
        move_down 10
        text 'end of this page'
    end

    def footer
        text "footer"
        start_new_page #=> Starts new page keeping current values
    end
end

解决方法

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